Lockout LED High

Potterton Lockout LED Fault Code

Also written as LOCKOUTLED — same fault.

The Potterton Lockout LED fault code means: your boiler has shut itself down as a safety precaution because it has detected an internal fault or an interrupted gas supply.. It appears on 1 Potterton model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Indicates that the boiler has locked out. The boiler is fitted with several protection devices and operation of any of these will cause the boiler to 'Lockout'.
Typical repair cost £100-350 (including labour)

DIY fix possible

Locate the reset button on the front control panel.Press and hold the reset button for several seconds.Check that your gas meter has credit and the isolation valve is open.

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Potterton models that show the Lockout LED fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Potterton Lockout LED fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026